I certainly understand the sentiment and would love to do the same. I expect I'd have no problem with pretty much all organisations that would be considered for support. I would however refuse to donate to organisations such as Monsanto or the RIAA and for this reason alone simply cannot say "I pledge 1 BTC to any charity/organisation which adds a Bitcoin donation option".
I think the policy is basically nothing political, nothing religious, and more charity than just non-profit. That would exclude any SuperPACs, as well as Monsanto and RIAA. So I wouldn't worry about that.